The meaning of Dun in dream | Dream interpretation
A dream of contrary. Being dunned for pay- ment in your dream por- tends an unexpected large profit or increase in in- come, unless you actually are in a financial mess, in which case the dream is simply asserting a threat to your mental welfare and you should try to work out a sensible plan with your creditors.
To dream that you receive a dun, warns you to look after your affairs and correct all tendency towards neglect of business and love.
To dream of being Dunned for payment presages financial success.